Insulator



L. STEINBERGER.

INSULATOR.

APPLICATION FILED 1AN.28, 1922.

Patented Aug. '22, 1922.

3 SHEETS-SHEET l.

L; STEII'NBERGEP.

INSULATOR.

APPLICATION FILED mmzs, 1922.

Patented Aug. 22, 1922.

3 SHEETS-SHEET 3.

INVENTOR- TTORNEY LOUIS STEINBERGER, or BROOKLYN, NEW YORK.

INsULA'ron. I

T 0 all whom it may concern Be it known that I, LoUIs STEINBERGER, a citizen of the United States, and a res dent of 1 the borough of Brooklyn, county of Kings, city and State of New 'York, have invented certain new and useful Improve ments in Insulators,-of which the followi11 is a specification.

- Iy invention relates to an insulator eonstruction having particular reference to the type of strain members embedded therein. This application is a continuation in part i of my application Serial No. 212,340,1iled vention.

January 17th, 1918, and it is filed in order to cure some obvious discrepancies in the description and an error of. the draughtsman in the drawing.-

One of the objects .of'myinvention is to provide strain membersot such a construetion as to prevent the concentration of-heat in the central portion of the'insulator body in whichithe strain members are embedded.

Another object of my invention is to so construct the strain members that the bridge portions thereof. willfacta asfelectrostatic stress distributors. p

Another object is to provide strain members in an insulating body which are so constructed that they will not only dis tribute electrical strains and stresses but will also function as a uniform mechanical strain. distributor.- I

, Another object of the invention is to provide strain members having annular or ring shaped bridge portions, the opposing faces of which are duplicates of each other and arranged ;to uniformly distribute electric stresses. p g Q f 1 Other objects will-appear from the sub. joined specification and claims.

Referring to the drawings, Fig. 1 is'a viewpartly in section and partly "in side ele vation ofan insulatorembodying my in-;

Fig. 2 is a similar view taken on line 2-2 otFig.;1.- g 1' I Fig. Bis a perspective. diagramatic View with parts broken away showing-the form, shape and disposition of the strain members preparatory tomolding them intothe insulatingbody. a v fThe insulating .material maybe of any suitable kind but Ixpriefer to use. theMmaterial knownin the: art as ElectrOse, and

the remaining parts are formedofanysuit-1 able metal or alloys thereof...

Specification 'of Letters Patent. Patented Aug. 22, 1922. 7 Application filedJ'anuary 28,1922. Serial No. 532,387 1 I Iteferringto the. drawings, 10 is a body of insulating'material which may be of any preferred shape but I have chosen to illusi tratea body having a contour as shown in Fig. 1. wherein the side of the body-has projecting radially therefrom a central flange 11 of greater diameter than the two radially projecting fianges l2 and'13 at either en 14 is an integral strain member, 15 is the embedded portion of a two'part strain memher having projecting legs 16 and 17, and 18 is the complementary portion of the strain memberwhich is secured to the arcectmg ends 16 and 17 of the embedded portions by means of nuts 19-and 20 engag ing' screwthreads 21 and 21 and 22 and 22" on the respectiveends ofthe portions 15 and 18 of the strain member, as well known in thisart. J

The strain members .are provided with bridge portions 30, and 31 which consist of rings 32 and33, each ofywhich is substantially circular in cross sectionand inte grally secured to theembedded leg portions 34 and 35 and 36 and 37 .ofthe respective strain members ,by means of offset arms 38, 89, 40 and 11 as shown.5 The strainmembers are interlocked one with theother so that in' case the insulating material should be'destroyed the line,wil1 not, fall to the' ground, and they are so situated with respect to each other that the respective rings of the bridge portions of the strain members will be oppositely disposed to eachother in the central portion of thebody of insu lating material, the distance between the respective rings being less thanthe dis-' tance between the ring of one strain member and the legs of the .other strain member.

The "special functions of the ring portions of the strain members are to act fas=elec trical stress or strain distributors, and at the same time act as uniform mechanical strain distributors. Because of the open or skeleton construction due to the oppositely disposed ring-portions, the-danger to' the insulating material arising out of heat con centration in the I central I portion of insulating body is greatly lessened.-

The opposing facesof the rings are curved. in cross section or convexf to eachother andi" each ring is-a duplicate of the other sothat each point on the opposingsur-face" of: one ring is directly. opposite a; -correspondingpoint on the surface of the other. 5 The elecg trio stresses or lines of force emanating from the rings are "therefore dispersed through out the body of insulating material lying between the two rings and do not tend to concentrate in sections between the rings. As the legs 34:, 35, 36 and 37 are no porntioned on their respective rings, 2c shown in the drawings, that they pan, opposing rings at a greater distance than the distance between the opposing surfaces of the ring, there is no appreciable tendency towards the setting up of stresses between the rings and the logs of the opposing ring.

The distance between the opposing rings is indicated in the drawing by the letter K, and the distance between the ring of one strain member and the respective of the other strain member by the letter Y, and, as above stated, the distance X is less than either of the distances Y, the distances Y being substantially equal to each other.

As illustrated perspectively in Fig. 3, the offset portions of the bridges of the strain member are curved at 50, 51, 52 and 53 in order to cause the ring or electrostatic stress distributor portions only to be positioned on the central part of the body of the insulating material. When thus offset the electrical strains and stresses will be more effectually distributed. betweenthe rings in the central portion of the insulating body, thus preventing the concentration of heat therein.

The distance between the bridge or ring portions is determined in accordance to the voltage to which the strain member to be subjected. As will be readily understood, the greater the space between the rings or bridge portions of the strain members the greater will be the insulation value of the insulator. In any case, however, the dis tance from a ring to the leg of the opposing ring should be greater than the distance be tween the rings.

As changes of construction could be made. within the scope of my invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in limiting sense.

Having thus described my invention what I claim as new and desire to secure by Iietters Patent is:

1. In a device of the kind described, an insulating body, interlocked strain members embedded therein, each of said strain members embodying leg portions and a stress distributing ring portion the cbetween, the said leg portions being rigidly secured to and bridged by the said ring portion, the ring portion of one of said strain members being disposed opposite to the ring portion of the other strain member, each of said ring portions being circular in vertical cross section, the ring portion of one strain member being insulated from the leg portions of the other strain member.

2. In a device of the kind described, interloclring strain members, each. of said strain members having leg por ions and a br dge portion embodying a stress distributing r ng, the said stress distributing rings being sim1- larly shaped, the said leg portions of each strain member being integral with and offset from the ring portion and disposed outside thereof, the respective rings having curved surfaces disposed opposite to each other.

3. In a device of the kind described, an insulating body, a strain member embedded therein, said strain member having leg portions and a stress istributing bridg ng ele ment embodying a ring shaped portion, the leg portions being connected to and oiliset from said ring shaped portion and disposed near the periphery of the insulating body, the ring portion being removed from and lo-* cated between the said leg portions of the strain member, the ring portion having a curved cross sectional surface.

4. In a device of the kind described, interlocking strain members, each strain member having leg portions connected by a stress distributing bridge portion therebetween, the said bridge portions each including a ring shaped member the said ring shaped members being duplicates of each other and round in vertical cross section, the ring portion and leg portions of one strain member being insulated respectively from the mug portion and the leg portions of the other strain m'ember.

In a device of the kind described, an insulating body, a strain member, said strain member consisting of a substantially U- shaped portion embedded in said insulating body, the legs thereof projecting out of the insulating body and being connected to each other by a stress distributing ring portion of less diameter than the distance between the leg portions, the said ring portion being round in vertical cross section.

6. In a device of the kind described, strain members, each strain member having leg portions and a bridge portion embodying a stress distributing ring, the respective rings I having curved surfaces disposed directly opposite to each other and situated wholly between the said leg portions.

7. In a device of the kind described, strain members, each strain member being provided with leg; portions and a ring shaped bridge portion thercbetween embedded entirely within the body of insulating material, each of said bridge portions having a curved surface, the curved surface of one bridge portion directly facing the curved surface of the other bridge portion, the two bridge portions being spaced apart by a portion of the insulating material.

8. In a device of the kind described, a

body of insulating material, strain members embedded therein, each strain member including a stress distributing ring shaped bridge portion provided with a curved surface, the respective strain members also hav ing leg portions extending from the respective ring portions out of the insulating ma terial in opposite directions, the legsbeing directly opposing portions of said surfaces being duplicates of each other.

10. In a device of the kind described, a body of insulating material, strain members therefor, each strain member including a 1 stress distributing ring entirelyv embedded in the body of insulating material, each of said rings being circular in vertical cross section, the stress distributing surface, of one ring being disposed directly opposite to the stress distributing surface of the other ring, the adjacent directly opposing portions of said surfaces being duplicatesof each other.

11. In a device of the kind described, in-

terlocking strain members, each strain member including a bridge portion, each bridge portion being similarly shaped and embodying a stress distributing ring, and leg portions integral'with and offset from the said ring outside thereof.

12. In a device of the insulating body, a strain member connected thereto, said strain member havingleg portions and a stress distributing bridging element therebetvveen embodying a ringshaped portion, the leg portions being; connected to and offset from saidring-shaped portion and disposed near the periphery of the insulating body, the'ring portion being removed from and located between the said leg portions of the strain member.

13. In a device of the kind described, a body of insulating material, strain members connected thereto, each strain member including a stress distributing ring shaped kind described, an

bridge portion, the respective strain members also having leg. portions extending from the rings in opposite directions, the legs being spaced apart and those connected to each ring passing outside of the other ring, the said bridge portions being disposed directl opposite to each other.

of a substantially U-shaped portion connected to the said insulating body, the legs thereof being connected to each other by a stress distributing ring portion of less diameter than the distance between the leg portions.

In witness whereof, I have hereunto set my hand at the borough of Manhattan, city and State of New York, this 23 day of J anuary, 1922.

LOUIS STEINB-ERGER,

n a device of the kind described, an lnsulatlng body, a strain member consisting I 

